Bradley Garrett, Urban Explorer

He may look like a kid in a hoodie, but Bradley Garrett has a degree in anthropology and history, a PhD in social and cultural geography, and is about to take up a research post at Oxford University. But away from his lofty academic work, this bespectacled American is a trespasser – "urban explorer" has a nicer ring – who infiltrates abandoned buildings, sewers, bridges and office-block rooftops, filming and photographing them to bring these hidden spaces to public view.
— guardian.co.uk